Leptogenesis in the presence of exact flavor symmetries
| Autor: | D. Aristizabal Sierra, Federica Bazzocchi |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Group (mathematics) media_common.quotation_subject High Energy Physics::Phenomenology FOS: Physical sciences Asymmetry High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Leptogenesis Homogeneous space High Energy Physics::Experiment Neutrino Specific model Realization (systems) Flavor media_common |
| DOI: | 10.48550/arxiv.1110.3781 |
| Popis: | In models with flavor symmetries in the leptonic sector leptogenesis can take place in a very different way compared to the standard leptogenesis scenario. We study the generation of a $B-L$ asymmetry in these kind of models in the flavor symmetric phase pointing out that successful leptogenesis requires (i) the right-handed neutrinos to lie in different representations of the flavor group; (ii) the flavons to be lighter at least that one of the right-handed neutrino representations. When these conditions are satisfied leptogenesis proceeds due to new contributions to the CP violating asymmetry and -depending on the specific model- in several stages. We demonstrate the validity of these arguments by studying in detail the generation of the $B-L$ asymmetry in a scenario of a concrete $A_4$ flavor model realization. Comment: 25 pages, 7 figures; version 2: A few clarifications added. Version matches publication in JHEP |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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